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/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.

This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or

modify it under the terms of the GNU Library General Public License as

published by the Free Software Foundation; either version 2 of the

License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

Library General Public License for more details.

You should have received a copy of the GNU Library General Public

License along with the GNU C Library; see the file COPYING.LIB.  If

not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,

Cambridge, MA 02139, USA.  */

/*

 *      POSIX Standard: 3.2.1 Wait for Process Termination      <sys/wait.h>

 */

#ifndef _SYS_WAIT_H

#define _SYS_WAIT_H     1

#include <features.h>

__BEGIN_DECLS

#include <gnu/types.h>

/* This will define the `W*' macros for the flag

   bits to `waitpid', `wait3', and `wait4'.  */

#include <waitflags.h>

#ifdef  __USE_BSD

/* Lots of hair to allow traditional BSD use of `union wait'

   as well as POSIX.1 use of `int' for the status word.  */

#ifdef  __GNUC__

#define __WAIT_INT(status)                                                    \

  (__extension__ ({ union { __typeof(status) __in; int __i; } __u;            \

                    __u.__in = (status); __u.__i; }))

#else

#define __WAIT_INT(status)      (*(int *) &(status))

#endif

/* This is the type of the argument to `wait'.  With GCC 2.6.1 and later,

   the funky union causes redeclarations with either `int *' or `union wait

   *' to be allowed without complaint.  __WAIT_STATUS_DEFN is the type used

   in the actual function definitions. */

/* g++ in gcc 2.6.1 doesn't work. Maybe 2.7.x. H.J. */

#if !defined (__GNUC__) || defined (__cplusplus) || \

         __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6) || \

         (defined(_MIT_POSIX_THREADS) && _MIT_POSIX_THREADS > 0)

#define __WAIT_STATUS   __ptr_t

#define __WAIT_STATUS_DEFN      __ptr_t

#else

/* This works in GCC 2.6.1 and later.  */

typedef union

  {

    union wait *__uptr;

    int *__iptr;

  } __WAIT_STATUS __attribute__ ((transparent_union));

#define __WAIT_STATUS_DEFN      int *

#endif

#else /* Don't use BSD.  */

#define __WAIT_INT(status)      (status)

#define __WAIT_STATUS           int *

#endif /* Use BSD.  */

/* This will define all the `__W*' macros.  */

#include <waitstatus.h>

#define WEXITSTATUS(status)     __WEXITSTATUS(__WAIT_INT(status))

#define WTERMSIG(status)        __WTERMSIG(__WAIT_INT(status))

#define WSTOPSIG(status)        __WSTOPSIG(__WAIT_INT(status))

#define WIFEXITED(status)       __WIFEXITED(__WAIT_INT(status))

#define WIFSIGNALED(status)     __WIFSIGNALED(__WAIT_INT(status))

#define WIFSTOPPED(status)      __WIFSTOPPED(__WAIT_INT(status))

#ifdef  __USE_BSD

#define WCOREDUMP(status)       __WCOREDUMP(__WAIT_INT(status))

#define W_EXITCODE(ret, sig)    __W_EXITCODE(ret, sig)

#define W_STOPCODE(sig)         __W_STOPCODE(sig)

#endif

/* Wait for a child to die.  When one does, put its status in *STAT_LOC

   and return its process ID.  For errors, return (pid_t) -1.  */

extern __pid_t __wait __P ((__WAIT_STATUS __stat_loc));

extern __pid_t wait __P ((__WAIT_STATUS __stat_loc));

#ifdef  __USE_BSD

/* Special values for the PID argument to `waitpid' and `wait4'.  */

#define WAIT_ANY        (-1)    /* Any process.  */

#define WAIT_MYPGRP     0        /* Any process in my process group.  */

#endif

/* Wait for a child matching PID to die.

   If PID is greater than 0, match any process whose process ID is PID.

   If PID is (pid_t) -1, match any process.

   If PID is (pid_t) 0, match any process with the

   same process group as the current process.

   If PID is less than -1, match any process whose

   process group is the absolute value of PID.

   If the WNOHANG bit is set in OPTIONS, and that child

   is not already dead, return (pid_t) 0.  If successful,

   return PID and store the dead child's status in STAT_LOC.

   Return (pid_t) -1 for errors.  If the WUNTRACED bit is

   set in OPTIONS, return status for stopped children; otherwise don't.  */

extern __pid_t __waitpid __P ((__pid_t __pid, int *__stat_loc,

                               int __options));

extern __pid_t waitpid __P ((__pid_t __pid, int *__stat_loc,

                             int __options));

#ifdef  __USE_BSD

/* This being here makes the prototypes valid whether or not

   we have already included <sys/resource.h> to define `struct rusage'.  */

struct rusage;

/* Wait for a child to exit.  When one does, put its status in *STAT_LOC and

   return its process ID.  For errors return (pid_t) -1.  If USAGE is not

   nil, store information about the child's resource usage there.  If the

   WUNTRACED bit is set in OPTIONS, return status for stopped children;

   otherwise don't.  */

extern __pid_t __wait3 __P ((__WAIT_STATUS __stat_loc,

                             int __options, struct rusage * __usage));

extern __pid_t wait3 __P ((__WAIT_STATUS __stat_loc,

                           int __options, struct rusage * __usage));

/* PID is like waitpid.  Other args are like wait3.  */

extern __pid_t __wait4 __P ((__pid_t __pid, __WAIT_STATUS __stat_loc,

                             int __options, struct rusage *__usage));

extern __pid_t wait4 __P ((__pid_t __pid, __WAIT_STATUS __stat_loc,

                           int __options, struct rusage *__usage));

#endif /* Use BSD.  */

__END_DECLS

#endif /* sys/wait.h  */